Machine for operating upon heels.



J. W. COSGROVE.

MACHINE FOR OPERATING UPON HEELS.

APPLICATl0N,HLED JUNE 12. 1915.

Patented Dec. 24, 1918.

mswmo onion JOHN -W. CQSGBOVE, 0E MEDFORD, MASSACHUSETTS, ASSIGNUR, BY MESNE ASSIGN- MENTS, TG UNITED SH'UJE MACHMEY EQEPORATION, 93F IPATEESON, NEW JERSEY,

A CQEPOEATIQN 01F NEW-JERSEY.

MAEHINE' E0 13, @PEEATING UPQES HEELS.

To all whom z't-may concern:

. Be it known that l, Jenn W. Coserovn, a. citizen of the United States, residing at ll/ledford, in the county of Middlesex and State of Massachusetts, have invented certain llmprovements in Machinesfor (Operating Upon Heels, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to machines for operating upon heels and is herein shown as embodied in a machine for attaching heels, although many of its features may be em.- ployed with good advantage in machines for performing other operations on heels.

In one of its aspects the invention consists in improvements in the machine disclosed in United States Patent No. LOSLQH',

I granted on an application of E. A. Tripp,

December 16, 1913, which machine is in common use for attaching wooden heels, that is to say, heels formed with a wooden core and a covering of leather, celluloid or other flexible material.

ln attaching wooden heels it is important, on account of the nature of their material and their somewhat unstable shape, to sub-.v ject each heel to the requisite amount of pressure and to position accurately the heel engaging members of the machine with respect to the heel so as to avoid the liability of fracturing the. heel in the nail driving operation. It is also important that the heel should be held upon its heel seat with sufiicient pressure to preclude the displace inent of the heel as otherwise the heel must be relocated and subjected to the second attaching operation which is detrimental for obvious reasons.

With these conditions in View, an important feature of the present invention consists in a heel engaging member movable variable distances in accordance with the height of the heel to be operated upon, in combination with spring operated locking means acting mechanically and automatically to maintain said member in the positlon of pressure to which it may have been moved.v

Such construction enables the operator to apply precisely the amount of pressure required for the particular heel being operated uponregardless of its height, shape or ma- Specincation of Letters Fatent.

without further efi'ort or attention on the part of the operator.

1 Another feature of the invention consists in normally inoperative spring actuated locking means so associated with the power operated mechanism of a heel attaching ma chine as to be rendered operative for maintaining the pressure upon the heel as soon as the machine is set in operation. An advantage of this conmruction is that the operator is free to make several trials of pressure or adjustment or the heel engaging members in arriving at the conditions best suited for'the heel being operated upon. When such trials have been made and the desired conditions secured the operator has only to start the machine to insure the maintenance of such conditions while the particular heel is being operated upon.

Still another feature of the invention consists in a novel locking mechanism for the presser head of a machine for operating upon heels. ln its illustrated form the looking mechanism comprises a pivoted dog relPatented Dec, 2d, ilhld.

Application mi June is, rare. serial no. same.

cessed to receive a rod or projection movable.

or projection and being maintained inoperative until the machine is set in operation. This construction has been found satisfactory and dependable in operation and well suited from a mechanical standpoint to the requirements of the machine.

These and other features of the invention will be best understood and appreciated from the following description of a preferred embodiment thereof selected for purposes of illustration and shown in the accompanying drawings, in which,'

Figure l. is a View of the machine in side elevation with certain parts broken away;

Fig. 2 is a view in perspective of the locking mechanism, and

Fig. 3 is a sectional View of the same mechanism.

The machine frame 10 is provided with a stationary bracket 12 upon which is mounted the jack it for the boot or shoe to which the heel is to be attached. The jack is so shaped as to enter a shoe presented in an inverted position and contains the drivers, not shown, by which the attaching nails are forced'through the sole from the inside of a shoe and into the heel which is maintained ,upon the heel seat thereof. The frame 10 is provided with vertical guideways in which is mounted a head 16 carrying the heel engaging members which 'com-' prise an adjustable block 18 for engaging the treadsurface of the heel and an ad ustable abutment 20 for engaging the rear surface of the heel. The head 16 is provided with a downwardly extending bar 22 and is maintained normally in an elevated position as determined by an adjustable stop 17, by a spring 23 extending between a hook in the lower end of the bar 22 and a stud inside the frame.

At its lower end the bar 22 is provided with a swiveled stud 26 to which is connected a treadle rod 25 made in two parts and connected by a turn buckle 24 for purposes of adjustment. At its lower end the treadle rod 25 is connected to an arm 28 fast to a treadle shaft 30 journaled in the lower portion of the frame. A second arm 32 is also fast to the treadle shaft 30 and is arranged to "be adjustably connected withthe heel engaging members into operative position and also of the location of the path of movement of the treadle.

At one side of the swivel stud 26 a second rod 36 is connected to the lower end of the bar 22. At its lower end the rod 36 is provided with an enlarged portion or bar 38 of rectangular cross section which is guided in a vertical path by passing between the parallel sides of a bracket 40 bolted to the front of the machine frame upon the inside thereof, The bracket 40 carries a transverse journal pin 42 upon which is pivoted a locking dog 44 apertured to receive bar 38, shown in Fig. 3. The opening 45 of the dog 44 is of such shape asto permit the free verticalmovement of the bar 38 so long as the dog occupies a substantially horizontal position but'any pivotal movement of the dog about its axi-s results in forcing the opposite edges of the recess 45 into locking engagement with the opposite surfaces of the bar 38. b In the lower portion of the bracket 40 is provided a-spring plunger 46 which bears against the outer end of the dog 44 and tends always to move it into locking position. The action of the spring plunger 46 is overcome and the dog held in an inoperative position while the machine is at rest by a cam 50 fast on the main Laseipat shaft 52 of the machine and arranged to lift an adjustable follower bolt 48 which is set in the inner end of the dog 44.

1 The main shaft 52 is provided at its rear end with driving pulley and with clutch mechanism 54 by which the starting and stopping of the machine is controlled. At

its forward end the shaft 52 carriesa crank 60 which through a crank link 62 operates a plunger 63 which carries the drivers above referred to. The operation of the. clutch 54 is under the control of the operator through a starting handle 58 pivoted upon the frame 10 adjacent to the jack and connected to a downwardly extending rod 56. The details of the starting and stopping mechanism it is unnecessary to discuss as it forms no part 'of the present invention but is disclosed in the prior patent above cam 50, moving in the direction of the ar- 7 row shown in Fig. 2, will immediately release the dog 44 thus permitting the spring plunger 46 to throw it into locking engagement with the bar 38.

The operation of the machine will be apparent from the foregoing description but it may be briefly outlined as follows: The shoe is first placed upon the jack 14 and the heel located by hand upon the heel seat. The operator then depresses the treadle 34 moving the head 16 downwardly and bringing the tread engaging block 18 upon the tread surface of the heel and the abutment 20 into engagement with its rear surface; If the adjustment of the members 18 and 20 is not suitable for the heel being operated upon the treadle is slightly released and the spring 23 permitted to elevate the head 16 topermit the operator to make the proper adjustment in the position of the members 18' and 20.

When these adjustments have'been madethe treadle is again depressed subjecting the heel to an amount of pressure .which will hold it firmly against displacement but Without danger of fracture. The machine is then set in operation by the depression of the hand lever 58 whereupon the dog 44, which has thus far been inoperative, is permitted to move into operative position, thus maintaini'ng the head 16 in the position to which it has been moved by the operator. The continued rotation of the shaft forces' the drivers upwardly to drive the attaching nails and during this operation the dog 44 remains operative and the head 16 is maintained in place. During the latter part of the cycle of the; machine the spiral surface of the cam 50 engages and gradually lifts the follower 48 so that when the machine is brought to rest the dog L4 occupies its normal inoperative position and the head is free to be lifted by the spring 23 to its initial position.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent:

1. A machine for attaching heels, having in combination a stationary jack shaped to support a shoe, nail driving mechanism located within the jack, a head movable toward the jack variable distances dependent upon the heel to be attached, a rod movable ,With the head, spring operated locking means arranged to act upon the rod, and a cam acting normally to restrain the lock from acting but movable to permit it to act when the machine is started.

I 2. A machine for operating on heels, having, in combination cooperating heel engaging members, one of which is maintained normally in a position remote from the heel, means for moving said member toward the other through varying distances dependent upon the thickness of the work without locking said member in position, power operated tools, and spring actuated locking mechanism for said member arranged to hold it in whatever position it occupies at the time of the actuation of the tools.

3. A machine for operating on heels, having, in combination, cooperating heel engaging members, treadle mechanism for moving one of said members to subject a heel to pressure, a stationary spring actuated lock normally maintained in inoperative condition, and power operated means for controlling the action of the lock whereby the movable member is locked to the machine frame in difierent positions of pressure dependent on the thickness of the work.

4, A machine for attaching heels, having in combination a jack for a shoe, a head movable toward the jack variable distances dependent upon the heel to be attached, a rod movable with the head, a pivotally mounted locking dog surrounding the rod, and a spiral cam having an abrupt drop-0E point, said cam being arranged in its initial position to hold the dog inoperative and to release the dog at said drop-0d point when the machine is started.

5. A machine for operating on heels, having, in combination, a movable head having an adjustable heel engaging member there on, a spring normally elevating the head from the heel to be operated upon, a. treadle connected to the head for pulling the head downwardly toward the heel, a locking bar connected to the head, and spring operated means acting on the bar for locking the head in difierent positions of pressure corresponding to heels of difierent heights independently of the treadle.

6. A machine for operating on heels, having, in combinatiom a ack for a shoe, a head movable relatively to the jack and carrying a heel engaging member, treadle mechanism for moving the head to press a heel upon the jacked shoe, a rod movable with the head, a pivoted locking dog arranged to receive the rod, a spring tending to throw the dog into locking engagement with the rod to lock the head, and a cam arranged to maintain the dog in inoperative position while the ma-Q chine is at rest and to permit the dog tolock the head in positionv of pressure when the machine is started.

- 7. A machine for attaching wooden heels to boots and shoes, having, in combination, a jack, a head arranged to reciprocate toward and from the jack, a bar secured to the head and extending past the jack on one side thereof, and locking means acting upon the bar at a point remote from the head.

In testimony whereof I have signed my name to this specification.

Jenn W.ICOSGROVE. 

